Brussels, 19 July 1957 - Institutional correspondence A letter from Émile Langui to Pablo Picasso, 19 July 1957
Brussels, 19 July 1957 - Institutional correspondence Émile Langui's letter to Pablo Picasso, dated 19 July 1957
Brussels, 6 September 1957 - Institutional correspondence Émile Langui's letter to Pablo Picasso, dated 6 September 1957
New York, 22 April 1960 - Institutional correspondence A letter from Jan-Albert Goris to Nelson Rockefeller, dated 22 April 1960
New York, 25 April 1960 - Institutional correspondence Jan-Albert Goris's letter to Nelson Rockefeller, dated 25 April 1960
Biscay, 1980 - Photograph Mural of the 60th anniversary of the PCE (the Communist Party of the Basque Country)
Brussels, 14 May 1956 - Institutional correspondence A letter from the Spanish ambassador in Belgium to Alberto Martín-Artajo Álvarez
Brussels, 22 December 1955 - Institutional correspondence Robert Giron's letter to Alfred H. Barr Jr.